Jack Rabinovitch (24 June 1930 – 6 August 2017) OC, O.Ont was a Canadian philanthropist best known for founding the Giller Prize which is named after his late wife, Doris Giller, a former literary columnist for the Toronto Star.

Rabinovitch was a reporter and speechwriter who later turned to business and made his fortune in food retailing and real estate. He was an executive with the real estate developer Trizec Corporation and helped develop six million square feet of hotel, commercial and retail space. He was Maclean's magazine's man of the year in 1999 and is a recipient of the Order of Canada and the Order of Ontario. Rabinovitch died on 6 August 2017, aged 87.